CVE-2008-6797 in Mitel NuPoint Messenger
Summary
by MITRE
The server in Mitel NuPoint Messenger R11 and R3 sends usernames and passwords in cleartext to Exchange servers, which allows remote attackers to obtain sensitive information by sniffing the network.
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Analysis
by VulDB Data Team • 07/26/2024
The vulnerability described in CVE-2008-6797 represents a critical security flaw in the Mitel NuPoint Messenger messaging system version R11 and R3. This issue stems from the improper handling of authentication credentials during network communication with Microsoft Exchange servers. The system fails to implement secure transmission mechanisms for sensitive user information, creating an exploitable condition that directly violates fundamental security principles of credential protection. The flaw specifically affects the server component of the messaging solution, which acts as an intermediary between end users and Exchange infrastructure, making it a prime target for network-based attacks.
The technical implementation of this vulnerability involves the transmission of authentication credentials in plaintext format over network connections. When users authenticate to the Mitel NuPoint Messenger system, their usernames and passwords are sent without encryption or obfuscation to the underlying Exchange servers. This cleartext transmission creates an inherent security risk that network sniffing tools can easily exploit to capture and decode sensitive information. The vulnerability essentially eliminates the cryptographic protection that should normally secure authentication data during transit, exposing users to credential theft and potential unauthorized access to corporate email systems.
From an operational impact perspective, this vulnerability creates significant risk for organizations using Mitel NuPoint Messenger systems. Remote attackers with access to the network traffic can capture authentication credentials and use them to gain unauthorized access to Exchange servers and associated email accounts. This allows for complete compromise of user email accounts, potential lateral movement within the network, and access to sensitive corporate data. The attack vector requires minimal technical expertise since standard network sniffing tools can capture the cleartext credentials, making this vulnerability particularly dangerous for organizations with limited network security monitoring capabilities. The exposure of user credentials can lead to widespread security breaches and compliance violations, especially in regulated environments where email security is paramount.
The vulnerability aligns with CWE-312 (Cleartext Storage of Sensitive Information) and CWE-310 (Cryptographic Issues) categories, representing a clear violation of secure coding practices and communication security standards. According to the MITRE ATT&CK framework, this vulnerability maps to T1071.004 (Application Layer Protocol: DNS) and T1566 (Phishing) as attackers can leverage the stolen credentials for further exploitation. Organizations should implement immediate mitigations including network segmentation to isolate critical systems, deployment of network monitoring tools to detect credential sniffing attempts, and implementation of encrypted communication protocols between the Mitel system and Exchange servers. The recommended solution involves upgrading to versions that support secure authentication mechanisms such as SSL/TLS encryption for credential transmission, which directly addresses the root cause of the vulnerability and aligns with industry best practices for secure communication protocols.